Rivet.



E. B. STIMPSON;

RIVET.

, APPLICATION FILED AUG. 20, 1907. 1906,74? Patented Dec. 15, 1908.

of uses,

EDWIN BALL STIMISON, OF

NEW-YORK, N. Y.

ASSIGNOR TO EDWIN B. STIMPSON COMPANY, A CORPORATION OF NIP-W YORK.

RIVET Specification of Letters Patent.

Patented Dec. 15, 1908.

Application filed August 20, 1907. Serial No. 389,341.

concern? Be it known that I, EDWIN BALL STIMP- son, a'citizen of the United States, and a resident of the borough of Brooklyn, city and State of New York, have invented cer tain new and useful Improvements in Rivets, of which the following is a specification.

My present invention relates to a rivet of improved construction applicable to a variety such as its use as a tire protecting device for automobiles.

In the drawings which show one of the forms which my invention may take, Figure '1 is a vertical mid-section partly in elevation of a complete rivet within my invention; Fig. 2 is the same except that the two parts of the rivet have not been permanently united Fig.

3 is a vertical mid-section partly in elevation of the head-member in Fig. 2 Fig. 4 is a top plan view of said head-member; and Fig. 5 is a side elevation of the shank member of Fig. 2.

Describing now my invention with particular reference to the devices of the drawings, the complete rivet shown in Fig. 1 comprises two arts, a head-member 1 and a shank-mem er 2.

Thehead-member 1n the particular rivetshown takes the form of a flat disk of metal with its underside rounded at the edges to permit the head-part of'the rivet to sink into the material or tire without cutting through it. The head-member is provided with a taper hole 3 through it to receive the shankmember. The shank-member has. a portion 4 forming the actual shank of the completed rivet and another portion that may be called its head, which is too large to pass through the hole in the head-member. The lower portion 5 of the shank-head tapers to correspond with the ta er of the hole through the head-member. T e upper ortion 6 of the shank-head tapers reverse y in the hole through the head-member.

When the parts are assembled as shown in members, as shown in Fi 1.

Fig. 2, the metal swaged against the taper faces of the shank head by a suitable machine-operation, there by permanently uniting the head and sheet- Thus, the reverse tapers on the shanlohea'd form a proje'ction on said head at a point intermediate the two faces of the headmember, which pro- 'ection is adapted to anchor the head-memer on the shank, when the parts are swag'ed together as. stated. I

The foregoing is one oithe ways without enumerating equivalents, by which to produce a cooperation in which there is a taper connection between the head-member and shank such that the parts cannot separate during wear, and further in which the shankmember has a portion located in the openin through the head-member, which the meta of said member confines above and below to anchor the shank in the opening.

When used for certain purposes, the shankhead may preferably project above the top I of the head-member as shown in Fig. 1.

Having thus described my invention what I claim is:

A rivet comprising a head formed out of a and a shank member having 0. ad. coated in said opening with the lower portion of the head adapted to the taper of the opening and with its upper portion ta ered reversely within the opening, the meta of the plate extending over the reversely tapered portion of the shankhead, and the shank-head being ailaptedto extend above the top face of the ate.

p In witness whereof, I have signed my name to the i'oregoingspecification in the presence of two subscribing witnesses.

EDlVIN BALL STIMPSON. Witnesses:

H. R. BAUER, E. W. Sonnnn. Jr.

metal plate provided with a taper o ening;

of the head-member is as 1 

